A002 MFC从零开始【分析CMyWinApp构造函数】-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44309027/article/details/133435258

本文详细描述了CWinApp类如何获取和管理当前程序模块状态（AFX_MODULE_STATE）和线程状态（AFX_MODULE_THREAD_STATE），以及AfxGetThread和AfxGetApp函数在Windows应用程序中的作用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

AFX_MODULE_STATE* pModuleState			//当前程序模块状态信息
AFX_MODULE_THREAD_STATE* pThreadState	//获取当前程序线程状态信息
    
CWinApp::CWinApp(LPCTSTR lpszAppName){	//构造全局对象 CMyWinApp theApp
	AFX_MODULE_STATE* pModuleState = AfxGetModuleState();			//获取当前程序模块状态信息
	AFX_MODULE_THREAD_STATE* pThreadState = pModuleState->m_thread;	//获取当前程序线程状态信息
    
   	pThreadState->m_pCurrentWinThread = this;						//this = CMyWinApp theApp
    ASSERT(AfxGetThread() == this);
    
    AfxGetThread(){													//AfxGetThread()获取theApp的地址
        AFX_MODULE_THREAD_STATE* pThreadState = AfxGetModuleThreadState();
        AfxGetModuleThreadState(){
            	AFX_MODULE_THREAD_STATE* pThreadState = pModuleState->m_thread.GetData();
                return pThreadState;
        }
        CWinThread* pThread = this;
        return &theApp;
    }
    
    m_hThread = ::GetCurrentThread();								//获取线程句柄
	m_nThreadID = ::GetCurrentThreadId();							//获取线程ID
    
    pModuleState->m_pCurrentWinApp = this;							//将theApp保存到模块状态信息中
    ASSERT(AfxGetApp() == this);
    
    AfxGetApp(){
        return AfxGetModuleState()->m_pCurrentWinApp;				//AfxGetApp()获取theApp的地址
    }
}